ADVANCED ELECTRICAL PROTECTION
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ELECTRICAL PROTECTION ADVANCED ELECTRICAL PROTECTION Electromechanics, Mechatronics, Electronics

| AEROSPACE.CROUZET.COM | 2 | PRODUCTS FORAIRCRAFT | WWW.AEROSPACE.CROUZET.COM | 3 | ELECTRICAL PROTECTION & DISTRIBUTION CONTENTS Pages With 60 years of presence in the aerospace market, Crouzet is a specialist providing reliable, efficient and customizable solutions in electromechanical switches, inductive sensors, electrical protection and cockpit equipment backed up by a loyal and experienced team of experts worldwide. Crouzet is a brand of InnoVista Sensors™. Electrical Protection line offers a large variety of circuit breakers and power distribution units to contribute to the...

| | ELECTRICAL PROTECTION & DISTRIBUTION | | ELECTRICAL PROTECTION & DISTRIBUTION WIRE PROTECTION HOW DOES IT WORK? ELECTROMECHANICAL CIRCUIT BREAKERS SOLID STATE CIRCUIT BREAKERS (SSCB) In this type of Circuit Breaker, the current sensing is done by a bi-metal. The bi-metal is also part of the actuator that will open the line: the bi-metal is bent by heat coming from the current, the bi-metal moves the key lock, releases the latch and opens the line. In this type of Circuit Breaker, the current sensing is done by a shunt or a Hall sensor in DC or a Current Transformer (CT) in AC. A...

| | ELECTRICAL PROTECTION & DISTRIBUTION | | ELECTRICAL PROTECTION & DISTRIBUTION WIRE & STRUCTURE & FUEL TANK PROTECTION ARC FAULT DETECTION EWIS PROTECTION The 14CFR Part 25 subpart H requirements asks aircraft OEM to consider the electrical wiring interconnection as a system. This means that the airworthiness of the wiring must be guaranteed for the complete lifetime of the aircraft. HOW DOES ARC FAULT PROTECTION WORK? AFCBs combine the safety of standard Circuit Breakers and high accuracy electronics to mitigate arcing. Each standard thermal Circuit Breaker is equipped with an...

| | ELECTRICAL PROTECTION & DISTRIBUTION | | ELECTRICAL PROTECTION & DISTRIBUTION WIRE & HUMAN & FUEL TANK PROTECTION GROUND FAULT CIRCUIT BREAKER (GFCB) WITH ARC FAULT FUEL TANK PROTECTION Following SFAR88 recommendation, the FAA and EASA have compelled PART 25 aircrafts to protect fuel tanks with Ground Fault. The purpose of these Ground Fault protection device is to preclude fuel tank puncture by reducing drastically the amount energy liberated by a fault. Electronic board Documents AC25981 and AMC25981(a) state that: «any components located in or adjacent to a fuel tank must be...

| WWW.AEROSPACE.CROUZET.COM | 10 | ELECTRICAL PROTECTION & DISTRIBUTION | WWW.AEROSPACE.CROUZET.COM | 11 | ELECTRICAL PROTECTION & DISTRIBUTION Our High-Performance Thermal Circuit Breakers exceed the standard for shock and vibration for military applications. It has allways been troublesome for electrical systems engineers to find the best suitable circuit breakers for harsh environments. Crouzet has developed a specific series of circuit breakers which go far beyond the current standards. When used in the vicinity of cannons or missile launchers and in circuit breaker panels...

| | ELECTRICAL PROTECTION & DISTRIBUTION | | ELECTRICAL PROTECTION & DISTRIBUTION ELECTRICAL DISTRIBUTION ELECTRICAL DISTRIBUTION CIRCUIT BREAKER PANELS THE «DO IT YOUR SELF» KIT & BUS BARS SUPPLIER OF CIRCUIT BREAKER PANELS ON SEVERAL JET AND HELICOPTER PROGRAMS Crouzet has extensive experience in the design, development and production of illuminated and non-illuminated Circuit Breaker panels in Push/Pull or Push/Push versions, wire or PCB-FASTON version. Crouzet is the first company to invent the concept of «do it yourself» Circuit Breaker panels and with this technique, it has created...

| WWW.AEROSPACE.CROUZET.COM | 14 | ELECTRICAL PROTECTION & DISTRIBUTION | WWW.AEROSPACE.CROUZET.COM | 15 | ELECTRICAL PROTECTION & DISTRIBUTION The RCCB's primary use is to power loads that do not need to be permanently ON (to optimize energy). This is why it is used: > For powering hydraulic actuators of cargo bay doors > For powering Electro Hydraulic Actuators (EHA) and Electro Backup Hydraulic Actuators (EBHA) > For powering ON and OFF the galleys or In Flight Entertainment (IFE) The RCCB contacts are CLOSED and OPENED (load is set ON and OFF) only once or twice during the...

| WWW.AEROSPACE.CROUZET.COM | 16 | ELECTRICAL PROTECTION & DISTRIBUTION | WWW.AEROSPACE.CROUZET.COM | 17 | ELECTRICAL PROTECTION & DISTRIBUTION SELECTION GUIDECHOICE BY STANDARD AND RATING AS3320 AS33201 Alternate Alternate QPL Standard Simulator same with black button DGMU DGMU 844006 same with green button black button same with black button same with black button rotated 180° DPMU DPMU DPMU DPMU same with different button value DPMU ATTACHEMENT HARDWARE CODIFICATION Hardware code FROG LEGS - BUS BARS extended trip extended trip DGMU DGMT

| ELECTRICAL PROTECTION & DISTRIBUTION | ELECTRICAL PROTECTION & DISTRIBUTION SMALL MODEL CIRCUIT BREAKER SINGLE POLEDPMU CURVES Ambiant Trip times envelope for temperature from -55°C to 125°C (direct overload) Maximum and minimum limit of ultimate trip Rating 1.5 ^ 5 A 7.5H 25 A 1 A 2 A 2.5 A 3 A 4 A 5 A 6 A 7.5 A 10 A 15 A 20 A 25 A 30 A Ratings 0.5; 0.75; 1.5 A are available. DIMENSIONS Non tripping point at 25°C Tripping point at 25°C Tripping time at 2 * RC Non tripping point at 125°C Threaded barrel Terminal Screw Black color Long neck option Conformity standard HV EN 2495 EN...

| ELECTRICAL PROTECTION & DISTRIBUTION | ELECTRICAL PROTECTION & DISTRIBUTION SMALL MODEL CIRCUIT BREAKER THREE POLE CURVES Trip times envelope for temperature from -55°C to 125°C (direct overload) 1 A 2 A 2.5 A 3 A 4 A 5 A 6 A 7.5 A 10 A 15 A 20 A 25 A 30 A Ambiant temperature Maximum and minimum limit of ultimate trip °C 120 100 80 60 40 20 0 -20 -40 -60 - Non-trip threshold Trip threshold Mounting hardware Threaded barrel Terminal Screw Button Green color Black color Long neck Mass / MTBF / Vibration / Technical file Mass without mounting hardware (g) Mass with mounting hardware (g) MTBF...